An interview on Forbes talks with Mike Capps, President of Epic Games about the developer's future plans (thanks Eurogamer). Along the way he explains that they are not working on any Unreal/Unreal Tournament games at the moment, though there's no word on whether they have any Jazz Jackrabbit projects in the works. Here's word:

Unreal and Unreal Tournament continue to have a huge influence on the studio here, even though we’re not currently working on an Unreal IP project. Epic’s core game making philosophy of “when everyone says it’s done, keep polishing!” came from our experiences with Unreal Tournament. That’s the beginning of our quality-focused studio DNA.